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Datasheet. SCREW 1/2 LG-1/ 4-28UNF-3A CRES specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3a
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
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.
0.490in. and 0.510in. ⁓33/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
headless (setscrew)
An element inserted into the fastener,or a design feature,that enables the fastener to effectively resist vibration and rotation.
strip threads or patch threads
The style designation indicating the configuration that most nearly corresponds to the appearance of the point.
cup
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
hexagon
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"
The shortest straight line between flats,perpendicular to the height.
0.125in. and 0.127in. ⁓9/64"
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
28
The chemical compound or mechanical mixture properties of which the item is fabricated.
steel comp 302 or steel comp 303 or steel comp 304 or steel comp 316
The specification,standard,or manufacturers reference,and the classification designation,such as class,condition,temper,and the like,that identifies the material.
66 fed std all material responses
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
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material.
QQ-P-35 fed spec single treatment response
A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.
unf
The number,letter,or symbol that indicates the type,style,grade,class,and the like,of an item in a nonidentifying specification or standard.
1 type and 4 style
Answers.
Unf
Steel comp 302 or steel comp 303 or steel comp 304 or steel comp 316
28
Headless (setscrew)
Right-hand
3a
Schedule B number: 7318152000
nmfc 093486
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-01-264-5876 SETSCREW
unf thread series passivate surface treated 28 thread quantity per inch headless (setscrew) head style right-hand 3a thread class
- NIIN
- 012645876
- NIIN Date
- 10/05/87
- Schedule B
- 7318152000
- Name Code
- 06672
- FIIG
- A003B0
- Item Weight
- 0.100lbs
- Item Dimensions
- --
- QUP
- Historical Price
- $20.73 EA
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- No precious metals
- 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. | FF-S-200 | Cage 81348 |
| 2. | MS18064-37 | Cage 80205 |
| 3. | MS18064-37 | Cage 96906 |
Major End Users Countries and entities
- - Department of The Air Force
- - Department of The Navy
- - Defense Threat Reduction Agency
- - United Kingdom
Availability for SCREW 1/2 LG-1/ 4-28UNF-3A CRES 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 setscrews with similar characteristics
Nothing similar to this part number was found in our inventory
SCREW 1/2 LG-1/ 4-28UNF-3A CRES / SetscrewWhat is the formal definition of this item?
An externally threaded device whose threaded portion is of one nominal diameter with or without a head and having a cup, cone, or other type of machined point designed to prevent or restrict relative movement of parts and designed to be driven with either a wrench or inserted driver. a locking feature may be incorporated in the design of the head or threads.
