PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FN1216-524Nut,self-Locking,extended Washer

Sps Technologies, Llc Dba PB Fasteners · NSN 5310-00-236-3114 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-00-236-3114 — this item is cataloged by the U.S. Government under National Stock Number 5310-00-236-3114. Primary manufacturer part number: FN1216-524.
Features
  • Nut,self-Locking,extended Washer — FSC 5310
  • Material: IRON ALLOY 660 OVERALL
  • Precious Material and Location: EXTERNAL SURFACE SILVER
  • Temp Rating: 1200.0 FAHRENHEIT NOMINAL DEGF
  • Nominal Thread Size: 0.312 INCHES IN
  • Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 27.0 ROCKWELL C MAXIMUM
  • Thread Quantity Per Inch: 24
  • Thread Direction: RIGHT-HAND
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Iron Alloy 660 Overall construction
General Description

The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-236-3114, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 23 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5310-00-236-3114
Primary Part NumberFN1216-524
Item NameNut,self-Locking,extended Washer
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerSps Technologies, Llc Dba PB Fasteners
StatusCANCELLED
MaterialIRON ALLOY 660 OVERALL
Precious Material and LocationEXTERNAL SURFACE SILVER
Temp Rating1200.0 FAHRENHEIT NOMINAL DEGF
Nominal Thread Size0.312 INCHES IN
Hardness Rating40.0 ROCKWELL C MINIMUM AND 27.0 ROCKWELL C MAXIMUM
Thread Quantity Per Inch24
Thread DirectionRIGHT-HAND
Material Document and ClassificationAMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Test Data Document07482-398+3 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING)
Surface Treatment Document and ClassificationAMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
Surface TreatmentSILVER OVERALL
Thread Class3B
Locking FeaturePREVAILING TORQUE ALL METAL DESIGN
Width Across Flats0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM IN
Thread SeriesUNF
Nut StyleDOUBLE HEXAGON
Washer Thickness0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN
Washer Outside Diameter0.525 INCHES MAXIMUM IN
Precious MaterialSILVER
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 5
5305-00-945-465210121213 INTERCHANGEABLE
Screw,externally Relieved Body
Us Army Aviation and Missile Command
5340-01-119-5694387533 INTERCHANGEABLE
Bracket,mounting
Brp Us Inc
5310-01-377-7891 INTERCHANGEABLE
Nut,plain,hexagon
8465-01-431-6798H335 INTERCHANGEABLE
Fastener,quick Release,strap
Para-Gear Equipment Co
5310-01-532-78053M961-5 INTERCHANGEABLE
Nut,self-Locking,extended Washer
The Boeing Company Div Defense
Cross-Reference Index
Part NumberManufacturer
H33-5 Klx Aerospace Solutions II SAS (FRA)
10121213 Nimikkeistokeskus Ncb Finland (FIN)
387534 Harvard Industries Inc (USA)
387534 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
R398P3H Bristol Industries, Llc (USA)
H33-5 Howmet Global Fastening Systems Inc (USA)
FN1216-524 Sps Technologies Inc Hallowell Div (USA)
FN1216-524 PRIMARY Sps Technologies, Llc Dba PB Fasteners (USA)
387534 Howmet Global Fastening Systems Inc (USA)
65015-524 Sps Technologies, Llc Dba PB Fasteners (USA)
R398P3 General Electric Company (USA)
LH3417-054 Harvard Industries Inc (USA)
387533 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
3M961-5 The Boeing Company Div Defense (USA)
R398P3C General Electric Company (USA)
387532 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
VN405B054 PRIMARY Howmet Global Fastening Systems Inc (USA)
BH00190-5 PRIMARY Bristol Industries, Llc (USA)
H33-5GE PRIMARY Howmet Global Fastening Systems Inc (USA)
379018 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
Related Parts
5305-00-945-4652INTERCHANGEABLE
SCREW,EXTERNALLY RELIEVED BODY
10121213
5340-01-119-5694INTERCHANGEABLE
BRACKET,MOUNTING
387533
5310-01-377-7891INTERCHANGEABLE
NUT,PLAIN,HEXAGON
8465-01-431-6798INTERCHANGEABLE
FASTENER,QUICK RELEASE,STRAP
H335
5310-01-532-7805INTERCHANGEABLE
NUT,SELF-LOCKING,EXTENDED WASHER
3M961-5

Frequently Asked Questions

What is NSN 5310-00-236-3114?

NSN 5310-00-236-3114 is a Nut,self-Locking,extended Washer, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5310-00-236-3114?

NSN 5310-00-236-3114 has 23 cross-referenced part numbers: H33-5 (Klx Aerospace Solutions II SAS), 10121213 (Nimikkeistokeskus Ncb Finland), 387534 (Harvard Industries Inc), 387534 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), R398P3H (Bristol Industries, Llc) and 18 more.

What NSN replaces 5310-00-236-3114?

There are 5 known substitutes for 5310-00-236-3114: 5305-00-945-4652, 5340-01-119-5694, 5310-01-377-7891 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of FN1216-524?

Key specifications for FN1216-524: Material: IRON ALLOY 660 OVERALL; Precious Material and Location: EXTERNAL SURFACE SILVER; Temp Rating: 1200.0 FAHRENHEIT NOMINAL DEGF; Nominal Thread Size: 0.312 INCHES IN. 20 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5310-00-236-3114 still in active supply?

NSN 5310-00-236-3114 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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