PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A1588Washer,lock

Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic · NSN 5310-00-318-8473 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-318-8473 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-318-8473. Primary manufacturer part number: A1588.
Features
  • Washer,lock — FSC 5310
  • Hole Diameter: 1.406 INCHES NOMINAL IN
  • Material: STEEL OVERALL
  • Outside Diameter: 2.500 INCHES NOMINAL IN
  • Hardness Rating: 55.0 ROCKWELL B MAXIMUM
  • Material Thickness: 0.060 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Steel Overall construction
General Description

The Washer,lock, cataloged under National Stock Number 5310-00-318-8473, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-00-318-8473
Primary Part NumberA1588
Item NameWasher,lock
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerTwin Disc, Incorporated Dba Twin Disc Mid-Atlantic
StatusACTIVE
Hole Diameter1.406 INCHES NOMINAL IN
MaterialSTEEL OVERALL
Outside Diameter2.500 INCHES NOMINAL IN
Hardness Rating55.0 ROCKWELL B MAXIMUM
Material Thickness0.060 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4320-00-069-2026A1588-3-875 INTERCHANGEABLE
Impeller,pump,centrifugal
Weil Pump Co Inc
4320-00-069-2027A1588 INTERCHANGEABLE
Impeller,pump,centrifugal
Weil Pump Co Inc
5310-00-209-414523374 INTERCHANGEABLE
Washer,key
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
2910-00-367-360925588D INTERCHANGEABLE
Link,fuel Pump
Komatsu America Corp.
5365-00-382-824171351 INTERCHANGEABLE
Shim
Triumph Engine Control Systems Llc
8455-01-018-8737 INTERCHANGEABLE
Insignia,shoulder Sleeve
5310-01-176-8059A1588 INTERCHANGEABLE
Washer,flat
Datamarine Intl Inc
5325-01-233-3008A1588 INTERCHANGEABLE
Eyelet,metallic
Edwin B. Stimpson Company, Inc. Dba Stimpson
5120-01-297-7910A257-1 INTERCHANGEABLE
Handle,driver
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
5331-01-420-20817135100 INTERCHANGEABLE
O-Ring
Alfa Laval Inc
Cross-Reference Index
Part NumberManufacturer
71351 Little Giant Crane and Shovel Inc (USA)
A1588 PRIMARY Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA)
Related Parts
4320-00-069-2026INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A1588-3-875
4320-00-069-2027INTERCHANGEABLE
IMPELLER,PUMP,CENTRIFUGAL
A1588
5310-00-209-4145INTERCHANGEABLE
WASHER,KEY
23374
2910-00-367-3609INTERCHANGEABLE
LINK,FUEL PUMP
25588D
5365-00-382-8241INTERCHANGEABLE
SHIM
71351
8455-01-018-8737INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
5310-01-176-8059INTERCHANGEABLE
WASHER,FLAT
A1588
5325-01-233-3008INTERCHANGEABLE
EYELET,METALLIC
A1588
5120-01-297-7910INTERCHANGEABLE
HANDLE,DRIVER
A257-1
5331-01-420-2081INTERCHANGEABLE
O-RING
7135100
8455-01-660-5778INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE
8455-01-714-7201INTERCHANGEABLE
INSIGNIA,SHOULDER SLEEVE

Frequently Asked Questions

What is NSN 5310-00-318-8473?

NSN 5310-00-318-8473 is a Washer,lock, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-00-318-8473?

NSN 5310-00-318-8473 has 2 cross-referenced part numbers: 71351 (Little Giant Crane and Shovel Inc), A1588 (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).

What NSN replaces 5310-00-318-8473?

There are 12 known substitutes for 5310-00-318-8473: 4320-00-069-2026, 4320-00-069-2027, 5310-00-209-4145 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A1588?

Key specifications for A1588: Hole Diameter: 1.406 INCHES NOMINAL IN; Overall Height: 0.188 INCHES NOMINAL IN; Material: STEEL OVERALL; Outside Diameter: 2.500 INCHES NOMINAL IN. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com