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Datasheet. 16991E-4C-12 specification
Thread Class
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3a
Thread Direction
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
RIGHT-Hand
Thread Length
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.760in. ⁓49/64"
Fastener Length
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.
The dimension,measured along a line parallel to the longitudinal axis,from the largest bearing surface of the fastener head to the extreme opposite end,or as specifically designated for other type fasteners.
0.740in. and 0.760in. ⁓49/64"
Head Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
flat countersunk
Head Diameter
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.507in.
Locking Feature
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.
pellet threads
Internal Drive Style
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
hexagon
Nominal Thread Diameter
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
The nominal length of a straight line which passes through the center of the threaded portion,and terminates at the circumference.
0.250in. ⁓1/4"
Width Across Flats
The shortest straight line between flats,perpendicular to the height.
The shortest straight line between flats,perpendicular to the height.
0.156in. and 0.158in. ⁓11/64"
Thread Quantity Per Inch
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
20
Countersink Angle
The included angle of the countersink.
The included angle of the countersink.
82.0 degrees
Material
The chemical compound or mechanical mixture properties of which the item is fabricated.
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp 303
Material Document And Classification
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
QQ-S-763 fed spec single material response
Surface Treatment
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
The metallic,nonmetallic,and/or chemical properties with which the item is plated,dipped,and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
passivate
Thread Series Designator
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unc
Answers.
What class is the thread series?
Unc
What material is the cap socket head screw made of ?
Steel comp 303
What is the thread quantity per inch?
20
What is the head style?
Flat countersunk
What is the thread length?
0.760 inches maximum
What is the thread direction?
Right-hand
What is the thread class?
3a
How is this classified for shipping?
Schedule B number: 7318152000
nmfc 093486
Bolts and bolts and their nuts or washers exported in the same shipment
What's the federal classification of 16991E-4C-12?
FSC 5305 ⁓ Screws
NSN 5305-00-842-3410 SCREW,CAP,SOCKET HEAD
unc thread series passivate surface treated 20 thread quantity per inch flat countersunk head style 0.760" thread length right-hand 3a thread class
- NIIN
- 008423410
- NIIN Date
- 01/01/60
- Schedule B
- 7318152000
- Name Code
- 16282
- FIIG
- A003B0
- Item Weight
- 0.100lbs
- Item Dimensions
- --
- QUP
- Historical Price
- $5.30 EA
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- Metal content unknown
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
Other Part Numbers Parts with same form, fit, and function by other manufacturers
| 1. | 12Z1201PC23 | Cage 94135 |
| 2. | 5AQM62CR1032-12E | Cage 02161 |
| 3. | 1621234PC2 | Cage 10001 |
| 4. | PL5010 ITEM 274 | Cage 89814 |
Major End Users Countries and entities
- - Department of The Navy
- - U.s. Coast Guard
- - Poland
- - Brazil
- - Spain
- - Thailand
- - Australia
- - Belgium
- - Canada
- - New Zealand
- - Germany
- - Republic of Korea
- - Netherlands
- - Portugal
- - Italy
- - Greece
- - Turkey
Availability for 16991E-4C-12 A member of our team will provide you with a price and availability quote
Request a Quote »Shipping Information
- Special Handling
- Other or no special handling required (sh)
- LTL (less than a truck load rating)
- Rating variable
- LCL (less than a car load rating)
- Unknown
- Special Cargo
- No special type of cargo code applicable
- Air Freight (Minimum cargo door size required)
- Shipment is not a consolidation and does not exceed 84 inches in any dimension.
- Customs Requirement Classification
- Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
- Commodity (for shipments via water)
- Metal hardware
- NMFC (national motor freight code)
- 093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3)
- UFC (universal freight code)
- 48950
Similar by Design Other screws with similar characteristics
Nothing similar to this part number was found in our inventory
16991E-4C-12 / Screw,cap,socket headWhat is the formal definition of this item?
An externally threaded fastener whose threaded portion is of one nominal diameter. the head has an internal socket or multiple spline for use with an inserted driver. a locking feature may be incorporated in the design of the head or threads. excludes items with bevel (conical) heads. see bolt, internal wrenching. excludes screw, shoulder; and screw, machine.
