Model: 3M261-4-8

Machine Bolt

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
0.397 inches
Fastener Length
Between 0.881 inches and 0.928 inches
Head Style
Double hexagon
Head Height
Between 0.154 inches and 0.174 inches
Width Between Flats
0.491 inches
Thread Diameter
0.250 inches
Grip Length
Between 0.490 inches and 0.510 inches
Features Provided
Unfinished head
Thready Qty Per Inch (tpi)
28
Min. Tensile Strength (psi)
6980 pounds per square inch
Material
Steel
Material Specification
76301-23-105 type 1 a mfr ref single material response
Surface Treatment
Cadmium
Surface Treatment Specification
Mac ps13145, mcdonnell douglas corporation mfr ref single treatment response
Thread Series Designator
Unjf
NSN
5306-00-482-2632
Part Number
3M261-4-8
Description
Bolt,machine
CAGE
76301

An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. The head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. See also screw, cap, hexagon head and screw, machine.

Part 3M261-4-8 NSN 5306-00-482-2632

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
01847
FIIG:
A003B0
Concept No.:
App. Key:
BR
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:
SX
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.0000lbs
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:
--
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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