NSN 5310-01-661-7956 · NIIN 016617956 · Part number WW-422-S-18
Hubbard M D Spring Co Inc · FSC 5310 — Nuts and Washers · FSG 53 — Hardware and Abrasives · CAGE 73287
Government record, cited
NSN 5310-01-661-7956 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-661-7956. Manufacturer of record part number: WW-422-S-18.
Also searched as5310-01-661-7956 ·
5310016617956 ·
NIIN 016617956 ·
01-661-7956 ·
FSC 5310 Nuts and Washers · CAGE 73287 · WW-422-S-18
Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Style Designator: SPRING TENSION
Material Document and Classification: ASTM A684/SAE 1074 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Outside Diameter: 1.771 INCHES MINIMUM AND 1.791 INCHES MAXIMUM IN
Material: STEEL OVERALL
Hole Diameter: 1.375 INCHES NOMINAL IN
1 manufacturer part number on file
Identification
NSN: 5310-01-661-7956
NIIN: 016617956
FSC: 5310 — Nuts and Washers
FSG: 53 — Hardware and Abrasives
Primary part number: WW-422-S-18
Manufacturer: Hubbard M D Spring Co Inc
General Description
The Washer,spring Tension, cataloged under National Stock Number 5310-01-661-7956, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Hubbard M D Spring Co Inc. Government technical data includes 6 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
5310-01-661-7956
Primary Part Number
WW-422-S-18
Item Name
Washer,spring Tension
FSC / FSG
5310 / 53 — Nuts and Washers
Manufacturer
Hubbard M D Spring Co Inc
Status
ACTIVE
Hardness Rating
45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM
Style Designator
SPRING TENSION
Material Document and Classification
ASTM A684/SAE 1074 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
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 5310-01-661-7956?
NSN 5310-01-661-7956 is a Washer,spring Tension, manufactured by Hubbard M D Spring Co Inc, classified under FSC 5310, Nuts and Washers. Status: active.
What part numbers are listed for NSN 5310-01-661-7956?
NSN 5310-01-661-7956 has 1 manufacturer part number on file: WW-422-S-18 (Hubbard M D Spring Co Inc).
What are the specifications of WW-422-S-18?
Key specifications for WW-422-S-18: Overall Height: 0.1875 INCHES NOMINAL IN; Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Style Designator: SPRING TENSION; Material Document and Classification: ASTM A684/SAE 1074 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 6 specifications are documented in the U.S. Government catalog.
Is NSN 5310-01-661-7956 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.