Home · NSN 01-671-8251

NSN 01-671-8251 — Screw,Shoulder

NIIN 01-671-8251 · unit of issue EA · AAC J (not stocked, central procurement) · source of supply SMS

NSN 01-671-8251 is the national stock number for a screw,shoulder. It cross-references to 1 manufacturer part number from 1 CAGE code, including National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use; the primary is MS51975-17P. The federal catalog ties it to the A-4. The unit of issue is EA and the FLIS list price is $20.48.

No government purchase of this stock number is on our record yet. No seller has confirmed stock of it here in the last 60 days; watching the number is free and the first listing triggers an alert.

part number from 1 CAGE

open solicitations, all agencies

government buys in 24 months

sellers with confirmed stock

Know someone who should see this?

Cross-references

Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.

Part number	CAGE	Manufacturer	Reference	Variation
MS51975-17P	80205	National Aerospace Standards Committee Aerospace Industries Association Of America Inc Not For Rfq Or Solicitation Use	3 · Design control (vendor)	2 · Fully interchangeable

Government demand

Nothing open right now. Watch this NSN and we will email you when it is solicited.

What the government paid

No government purchase on record for this NSN.

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices.

Sellers with confirmed stock

No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on MS51975-17P.

Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.

DLA management data

FLIS unit price: $20.48
Unit of issue: EA
Acquisition advice: J — Not stocked, central procurement
Source of supply: SMS
Effective: Oct 1, 2026

Item characteristics

Thread Class: 3A
Thread Direction: RIGHT-HAND
Thread Length: INCHES MINIMUM 0.480 AND INCHES MAXIMUM 0.500
Fastener Length: INCHES MINIMUM 1.105 AND INCHES MAXIMUM 1.125
Head Diameter: INCHES MINIMUM 0.543 AND INCHES MAXIMUM 0.562
Head Height: INCHES NOMINAL 0.209
Shoulder Diameter: ALL SHOULDERS INCHES MINIMUM 0.371 AND INCHES MAXIMUM 0.373
Shoulder Length: ALL SHOULDERS INCHES NOMINAL 0.625
End Item Identification: A4 BRADLEY FIGHTING VEHICLE
Nominal Thread Diameter: INCHES 0.3125
Width Across Flats: INCHES NOMINAL 0.188
Thread Quantity Per Inch: 18
Chamfer Angle: DEGREES MINIMUM 30.0 AND DEGREES MAXIMUM 45.0
Shoulder Shape: ALL SHOULDERS ROUND
Material: OVERALL STEEL
Material Document And Classification: OVERALL NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE NAS- 21472
Surface Treatment: OVERALL ZINC
Surface Treatment Document And Classification: OVERALL ASSN STD SINGLE TREATMENT RESPONSE AST- B633, TYE II, CLASS FE TO ZN 5
Thread Series Designator: UNIFIED NATIONAL COARSE (UNC)
Specification/Standard Data: NATIONAL STD/SPEC 80205-NAS-51975

About this page

An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.