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Datasheet. MS51957-78B specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
2a
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
A measurement of the extent of threads,including incomplete threads,along a line parallel to the longitudinal axis.
0.307in. and 0.438in. ⁓29/64"
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.
0.407in. and 0.438in. ⁓29/64"
The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
pan
The length of a straight line which passes through the center of a circular head,and terminates at the circumference.
0.483in.
A measurement from the bottom to the top of the head,in distinction from depth.
0.162in. and 0.175in. ⁓3/16"
The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
cross recess type 1
The national stock number or the identification information of the end equipment for which the item is a part.
C-17A aircraft
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 number of threads on the item per linear inch measured on a line parallel to the thread axis.
20
The chemical compound or mechanical mixture properties of which the screw is fabricated.
steel comp 302 or steel comp 304 or steel comp 304l or steel comp 305
The metallic,nonmetallic,and/or chemical properties with which the screw is plated,dipped and/or coated.the treatment is designed to protect the surface(s) and cannot be wiped off.
oxide
The specification,standard,or manufacturers reference,and the classification designation,such as type,class,grade,and the like,that identifies the surface treatment material of the screw.
MIL-C-13924, class 4 mil spec single treatment response
A characteristic of light that can be specified in terms of luminance,dominant wavelength,and purity.
black
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.
1EA
Unc
Oxide
20
Pan
0.307 inches minimum and 0.438 inches maximum
Right-hand
2a
Schedule B number: 7318152000
nmfc 093490
Bolts and bolts and their nuts or washers exported in the same shipment
FSC 5305 ⁓ Screws
NSN 5305-01-533-2432 SCREW,MACHINE
Used on c-17a aircraft. unc thread series oxide screw surface treated 20 thread quantity per inch pan head style 0.307" thread length right-hand 2a thread class
- NIIN
- 015332432
- NIIN Date
- 09/07/05
- Schedule B
- 7318152000
- Name Code
- 06657
- FIIG
- A500D0
- QUP
- 1
- Historical Price
- $25.00 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
Major End Users Countries and entities
- - Department of The Air Force
- - Canada
- - Nato Maintenance And Supply Agency
Availability for MS51957-78B 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)
- 50.0
- 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)
- 093490 BOLT/NUT/SCREW/CLIPS/FASTENER/ETC
- UFC (universal freight code)
- 50270
Similar by Design Other screws with similar characteristics
Nothing similar to this part number was found in our inventory
MS51957-78B / Screw,machineWhat is the formal definition of this item?
An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). no. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. a locking feature may be incorporated in the design of the head or threads. excludes bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. see also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.
