Model: 3M105-4-3

Shoulder Screw

Special Features:

Knurled head optional

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.303 inches and 0.323 inches
Fastener Length
Between 0.735 inches and 0.765 inches
Head Style
Flat chamfer
Head Diameter
Between 0.357 inches and 0.375 inches
Head Height
Between 0.182 inches and 0.188 inches
Shoulder Diameter
0.245 inches first shoulder and 0.248 inches first shoulder
Shoulder Length
0.370 inches first shoulder and 0.380 inches first shoulder
Internal Drive Style
Hexagon
Thread Diameter
0.190 inches
Width Across Flats
Between 0.125 inches and 0.127 inches
Thready Qty Per Inch (tpi)
24
Min. Tensile Strength (psi)
160000 pounds per square inch
Shoulder Shape
Round first shoulder
Material
Steel
Material Specification
Mil-h-6875 military specification single material response
Surface Treatment
Cadmium
Thread Series Designator
Unc
NSN
5305-01-015-5224
Part Number
3M105-4-3
Description
Screw,shoulder
CAGE
76301

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes bolt, internal wrenching and screw, cap, socket head.

Part 3M105-4-3 NSN 5305-01-015-5224

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22846
FIIG:
A003B0
Concept No.:
App. Key:
SL
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

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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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