Roughneck® 4D Derrick Bosun Belted Full Body Harness

Name: Fall Tech
Address: 1306 S. Alameda St., Compton, CA 90221, Compton, CA, 90221, US
Telephone: (800) 719-4619

Contact Sales

Built for rugged derrick work, this full-body harness combines durable construction, multiple D-ring connections, and reliable all-day support for demanding climbing and positioning applications.

Downloads

Instruction Manual

Harness Sizing Chart

Spec Sheet

Compliant With:

OSHA 1926.502 and 1910.140

SKU:: 8021
UPC:
Material 2 Header:: D-rings
Material 2 Detail:: Plated alloy steel; 5,000 lb min. static strength
Material 1 Detail:: Polyester; 5,000 lb min. static strength
PLP Icon - FBH - D-Rings:: 4
document file 1:: instruction_manuals/MFBH04_Rev_E_050525_EN_ES_FR.pdf
Performance 1 Header:: Static Strength
Filter - D-Ring Connecting Elements:: Dorsal, Suspension and Waist/Rear
PLP Icon - FBH - Leg Connection:: TB
7th Bullet:: Tongue buckle legs are uniquely equipped with 9 grommeted adjustment positions for a wider range of fit
1st Bullet:: Features 3" wide integrated sling seat with suspension D-rings and upper-torso mating buckles for belly belt attachment
Material 1 Header:: Webbing
Product Type:: Belted Full Body Harness
Performance 1 Detail:: 3,600 lb min.
Family Group:: Roughneck®
Performance 3 Header:: OSHA User Capacity
document file 2:: sizing_charts/FallTech_Harness_Sizing_Chart_Men_2025.pdf
document name 1:: Instruction Manual
6th Bullet:: D-rings, tongue buckle leg, and mating buckle chest closures are all durably finished with plated alloy steel construction
category tier 3:: Roughneck®
4th Bullet:: Features dorsal D-ring Extension and waist D-ring for restraint applications
5th Bullet:: Friction roller torso adjusters provide simple upper-body adjustment
3rd Bullet:: 4" waist support positioning pad enhances user comfort and retains durable tool belt
8th Bullet:: Meets OSHA 1926.502 and 1910.66 Regulations
Material 3 Detail:: Plated alloy steel; 3,372 lb min. static strength
parent part number:: 8021
Relevant Standards 1:: OSHA 1926.502 and 1910.140
Performance 2 Header:: ANSI User Capacity
Sizes Available:: 4 sizes available
Other Items You May Need:: 8031, 8209, 72706TB1
category tier 2:: Full Body Harnesses
Filter - Configuration:: Belted
Filter - Buckles and Adjusters:: Tongue Buckle Legs with Mating Buckle Chest
Filter - Webbing Material:: Polyester
Filter - Hardware Material:: Plated Alloy Steel
Filter - Application:: Fall Arrest, Suspension and Restraint, 4D
document name 2:: Harness Sizing Chart
Similar Solutions:: 8021FN
Filter - Brand:: Roughneck®
Performance 3 Detail:: 130 to 425 lb max.
Material 3 Header:: Buckles and Adjusters
Filter - OSHA:: OSHA Compliant
Performance 2 Detail:: 130 to 310 lb max.
2nd Bullet:: Utilizes #8031 removable Belly Belt for monkey board applications (sold separately).
Instruction Manual:: https://cdn11.bigcommerce.com/s-1wxw1202sk/content/product_documents/instruction_manuals/MFBH04_Rev_E_050525_EN_ES_FR.pdf
BC Status:: Yes
Related Products:: 8021FN,8031,8209,72706TB1
Size 1:: 8021S - Small
Size 2:: 8021M - Medium
Size 3:: 8021L - Large
Size 4:: 8021XL - XL
Descriptor 1:: 4 D-Rings: Dorsal, Suspension, Restraint
Descriptor 2:: Tongue Buckle Leg Adjustment
BC Category:: 126

1306 S. Alameda St., Compton, CA 90221 | (800) 719-4619 | www.falltech.com 07/16/2026

Roughneck® 4D Derrick Bosun Belted Full Body Harness

Downloads

Compliant With:

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