Model: HF91-L-12-D-3

Spline Self-locking Nut

Properties:

Thread Class
3b
Thread Direction
Right-hand
Locking Feature
Prevailing torque all metal design
Pilot Diameter
Between 0.285 inches and 0.315 inches
Pilot Length
Between 0.177 inches and 0.207 inches
Lubrication
Dry film lubricant
Nut Style
Spline (floating)
Nut Length
Between 0.635 inches and 0.665 inches
Nut Height
0.620 inches
End Application
W/s: aircraft, airlifter c-17a
Width Across Flats
Between 0.435 inches and 0.465 inches
Thread Series
Unjf
Thready Qty Per Inch (tpi)
28
Thread Size
0.250 inches
Material
Iron alloy 660 nut
Material
Steel comp 302 boss or steel comp 304 boss or steel comp 305 boss or steel comp 316 boss or steel comp 384 boss
Material
Steel comp 631 bracket
Material Specification
Ams 5528 assn standard single material response bracket
Material Specification
Ams 5525 assn standard single material response nut
Material Specification
Astm a493 assn standard all material responses boss
Surface Treatment
Cadmium boss and chromate boss
Surface Treatment
Cadmium bracket and chromate bracket
Surface Treatment
Passivate nut
Surface Treatment Specification
Qq-p-35 federal specification single treatment response nut
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response boss
Surface Treatment Specification
Qq-p-416, type 2, cl 2 federal specification single treatment response bracket
NSN
5310-01-457-6238
Part Number
HF91-L-12-D-3
Description
Nut,self-locking,spline
CAGE
0HDW7

A nut having an externally splined sleeve, which holds it in position when forced into a hole of slightly smaller diameter. An integral feature is incorporated for locking.

Part HF91-L-12-D-3 NSN 5310-01-457-6238

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15893
FIIG:
A021A0
Concept No.:
1
App. Key:
CE
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
BA
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
B

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Schedule B and Export
  • Schedule B: 7318160000
  • SITC: 69421
  • End Use: Finished metal shapes
  • NAICS: 332722
  • USDA: 1

Freight Class: Nuts of iron or steel

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