Home · NSN 01-137-3938

NSN 01-137-3938 — Screw,Tapping

NIIN 01-137-3938 · unit of issue PG · AAC Z (insurance item) · source of supply SMS

NSN 01-137-3938 is the national stock number for a screw,tapping. It cross-references to 1 manufacturer part number from 1 CAGE code, including Military Standards Promulgated By Military Departments Under Authority Of Defense Standardization Manual 4120 3-M; the primary is MS51871-3. The unit of issue is PG and the FLIS list price is $27.69.

No government purchase of this stock number is on our record yet. A DLA long-term contract solicitation (SPE4A726RXB43) names it, with an estimated annual demand of 80. 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

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Cross-references

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

Part number	CAGE	Manufacturer	Reference	Variation
MS51871-3	96906	Military Standards Promulgated By Military Departments Under Authority Of Defense Standardization Manual 4120 3-M	2 · Item ident. reference	2 · Fully interchangeable

Government demand

Long-term contracts and larger buys (DLA RFP / IFB)

SPE4A726RXB43 · long-term contract, 5 yr · estimated annual demand 80 · closes Oct 2, 2026

When a stock number goes onto a long-term contract, the spot RFQs for it usually stop for the term; the holder then sources the parts. All open long-term contracts →

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 MS51871-3.

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

DLA management data

FLIS unit price: $27.69
Unit of issue: PG
Acquisition advice: Z — Insurance item
Source of supply: SMS
Effective: Oct 1, 2025

Item characteristics

Fastener Length: INCHES MINIMUM 0.720 AND INCHES MAXIMUM 0.750
Head Height: INCHES MINIMUM 0.202 AND INCHES MAXIMUM 0.240
Width Between Flats: INCHES MINIMUM 0.367 AND INCHES MAXIMUM 0.375
Extended Washer Diameter: INCHES MINIMUM 0.480 AND INCHES MAXIMUM 0.520
Extended Washer Thickness: INCHES MINIMUM 0.030 AND INCHES MAXIMUM 0.050
Features Provided: CASE-HARDENED
Minimum Tensile Strength: POUNDS PER SQUARE INCH 150000
Hardness Rating: OVERALL ROCKWELL C MINIMUM 32.0 AND ROCKWELL C MAXIMUM 38.0
Nonmachine Nominal Thread Diameter: INCHES 0.250
Material: OVERALL STEEL COMP 4037
Material Document And Classification: OVERALL FED STD SINGLE MATERIAL RESPONSE 66
Surface Treatment: OVERALL CADMIUM OR CHROMATE
Surface Treatment Document And Classification: OVERALL FED SPEC 1ST TREATMENT RESPONSE QQ--416 TY2 CL2 OR MIL SPEC 2ND TREATMENT RESPONSE -IL-C-81562 TY2 CL2

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.