Model: 31508

Ribbed Shoulder Bolt

Properties:

Thread Class
2a
Thread Direction
Right-hand
Thread Length
Between 0.844 inches and 0.906 inches
Fastener Length
Between 1.719 inches and 1.871 inches
Head Style
Pan no. 2
Head Diameter
0.750 inches
Head Height
Between 0.229 inches and 0.239 inches
Shoulder Diameter
0.526 inches first shoulder and 0.531 inches first shoulder
Shoulder Length
0.552 inches first shoulder and 0.562 inches first shoulder
Rib Major Diameter
Between 0.552 inches and 0.562 inches
Rib Length
Between 0.552 inches and 0.562 inches
Distance From Largest Diameter Of Bearing Surface Of Head To Ribs
0.062 inches
Thread Diameter
0.500 inches
Features Provided
Casehardened
Thready Qty Per Inch (tpi)
20
Min. Tensile Strength (psi)
110000 pounds per square inch
Hardness Rating
20.0 rockwell c and 24.0 rockwell c
Shoulder Shape
Ribbed first shoulder
Material
Steel comp 1020
Material Specification
Qq-s-634 federal specification single material response
Surface Treatment
Cadmium
Thread Series Designator
Unf
NSN
5306-00-579-5406
Part Number
31508
Description
Bolt,ribbed Shoulder
CAGE
0W357

An externally threaded fastener whose threaded portion is of one nominal diameter. It has a series of longitudinal ribs, splines or serrations on all or a part of the shoulder. The minor diameter of the ribs must be greater than the major diameter of the threads. See also bolt, ribbed neck.

Part 31508 NSN 5306-00-579-5406

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16014
FIIG:
A003B0
Concept No.:
App. Key:
BU
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:
U
ESD:
ESD:
MMAC:
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:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
093486
UFC:
48950
LTL:
RATING VARIABLE
LCL:
50.0
WCC:
573
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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