Washer, Shouldered and Recessed5310-01-169-3188

NSN 5310-01-169-3188 · NIIN 011693188 · Part number 70209-26007-131

Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 78286

Government record, cited

NSN 5310-01-169-3188 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-169-3188. Manufacturer of record part number: 70209-26007-131.

Also searched as 5310-01-169-3188 · 5310011693188 · NIIN 011693188 · 01-169-3188 · FSC 5310 Nuts and Washers · CAGE 78286 · 70209-26007-131

Nearby stock numbers ← 5310-01-169-3187 Nut Assembly, Self-Locking, Gang C · 5310-01-169-3384 →

5310-01-169-3188 — Nuts and Washers

Features

Washer,shouldered and Recessed — FSC 5310
Surface Finish: 63.0 MICROINCHES SHOULDER FACE
Surface Finish: 63.0 MICROINCHES COUNTERBORE WALL
Surface Treatment Document and Classification: QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Shoulder Height: 0.195 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
Hardness Rating: 28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
Style Designator: SHOULDERED AND RECESSED BOTH SIDES
Material Document and Classification: MIL-S-5000,COND E4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL

Identification

NSN: 5310-01-169-3188
NIIN: 011693188
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: 70209-26007-131
Manufacturer: Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp

General Description

The Washer,shouldered and Recessed, cataloged under National Stock Number 5310-01-169-3188, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5310-01-169-3188
Primary Part Number	70209-26007-131
Item Name	Washer,shouldered and Recessed
FSC / FSG	5310 / 53 — Nuts and Washers
Manufacturer	Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
Status	ACTIVE
Surface Finish	63.0 MICROINCHES SHOULDER FACE
Surface Finish	63.0 MICROINCHES COUNTERBORE WALL
Surface Treatment Document and Classification	QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
Shoulder Height	0.195 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN
Hardness Rating	28.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
Style Designator	SHOULDERED AND RECESSED BOTH SIDES
Material Document and Classification	MIL-S-5000,COND E4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter	1.188 INCHES NOMINAL IN
Material Thickness	0.050 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN
Shoulder Diameter	1.0660 INCHES MINIMUM AND 1.0665 INCHES MAXIMUM IN
Recess Diameter	0.060 INCHES NOMINAL IN
Surface Treatment	CADMIUM AND CHROMATE OVERALL
Material	STEEL COMP E4340 OVERALL
Hole Diameter	0.7023 INCHES MINIMUM AND 0.7033 INCHES MAXIMUM IN
Recess Angle	90.0 DEGREES NOMINAL

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
70209-26007-131 PRIMARY	Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA)

No interchangeability data on file.

Other items in FSC 5310 — Nuts and Washers

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

5310-00-000-0040

5310-00-000-0040 · Item name not on file

5310-00-000-0077

NUT,PLAIN,ROUND

5310-00-000-0079

WASHER,FLAT

5310-00-000-0079

WASHER,FLAT

5310-00-000-1146

5310-00-000-1146 · Item name not on file

5310-00-000-3815

5310-00-000-3815 · Item name not on file

5310-00-000-4532

5310-00-000-4532 · Item name not on file

5310-00-000-4540

5310-00-000-4540 · Item name not on file

Frequently Asked Questions

What is NSN 5310-01-169-3188?

NSN 5310-01-169-3188 is a Washer,shouldered and Recessed, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.

What part numbers are listed for NSN 5310-01-169-3188?

NSN 5310-01-169-3188 has 1 manufacturer part number on file: 70209-26007-131 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).

What are the specifications of 70209-26007-131?

Key specifications for 70209-26007-131: Surface Finish: 63.0 MICROINCHES SHOULDER FACE; Surface Finish: 63.0 MICROINCHES COUNTERBORE WALL; Surface Treatment Document and Classification: QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Shoulder Height: 0.195 INCHES MINIMUM AND 0.200 INCHES MAXIMUM IN. 15 specifications are documented in the U.S. Government catalog.

Is NSN 5310-01-169-3188 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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